These filter papers are designed for gravimetric analysis and the preparation of samples for instrumental analysis. The classic general-purpose ashless filter paper with medium speed and retention.
Whatman Grade 40 high-purity filters are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.
With the finest retention of all Whatman ashless filter paper grades, Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.
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